Drilling and reaming machine



May 14, 1929.

H. W. M MILLAN DRILLING AND REAMING MACHINE "Filed Aug. 1', 1927 2 Sheets-Sheet l A INVENTOR HERBERT.VV,M9MILLAN y 14, 1929- H. w. M MILLAN DRILLING AND REAMING MACHINE Filed Aug. 1, 1927 2 Sheetsfiheet 2 FIG-4 INVENTOR HERBERTWMQMILLAN Patented May 14, 1929.

UNITED STATES HERBERT MCMILLAN, G35 LAGHINE QUEBEC,

DRILLING AND Hillel [ENG MAQHIIFTE.

Application filed August 1, 1927. Serial No, 209,922.

This invention relates to new and useful improvements in drilling and reainingmw chines, and the object oft-he invention is to provide a machine which will he quickly and *asily adjusted for drilling and roaming holes in the circuniferentia and longitudinal seams of boilers, pulp digesters, and like vessels, which may he of cylindrical, conicah or spherical form. i

Another object is toprovide a lllitOl'llIlG of simple construction which may he easilyassernhled within the hoiler or like structure, to

facilitate the operation of drill ing; or reaming holes at any desired part of the shell and any angle thereto so that the cost of such drill inn is reduced to a minimum. i

According to my invention, the drilling and reaming device is pivotally and slidahly mounted in an arm whichnnty he angularlv adjusted in a mast rotatahly held in position in suitable hearings. The mast is mounted within the shell to he drilled and by moving the drilling mechanism support in a. substautiallv vertical direction within the arm adjusting the angular position of same or by rotating the nuist about its pivotal supports, the drill may he quickly adjusted so that any holes may he drilled in any part of the shell Wil llOllt moving; same. Means are provided for locking the arm at any dcsireifl angle and means are provided for raising the drill rotatin mechanism and for holding saru'ie in any desired position.

In the drawings which show my preferred form of the inventionsl igure 1 is a vertical end elevation of the machine with parts thereof shown in section.

Figure 2 is a vertical part siu-tioual elevation of the machine tattoo on thelinc l--il .lfi n'lre '1.

Figure 3 a plan view of the drill and the rotating mechanism therefor.

Figure 4i: is a diagraniunatic illiuitratiim of the machine inoui'ited Wllillil'l part of a dig 'ester shell.v

Referring more particularly to the drawinns 11 designates the mast iiuunhers which are spaced from one another and held to nether by means of the crosshezuls l2 and i positioned. respectively at the upper and lower ends of the inen'ihers. The lower crosshead has a downwardly extending pin i l which is rotatahly held in a foots'tep hearing 15, secured to foundation 1.6. The upper crosshead is recessed to receive a pin 1Tdepending l'roin a hearing 18 smured to a heain 19. Pivotally secured to the l'lltliiit incinljiers by means of the pins 21 is thearui 520. The arm com-guises tu'o chaunel-sluq ied uieu'ihcrs held apart at their ends hy means of the spacirng men'ihcrs and 23, said arm loclng seconstructcd that it can he moved into a posit on. suhstautially parallel to the mast.

Au adjustaliilc coui'lection 524i is provided between them ast and the arm, so thatsainecan he held in an adjusted position. 'lhe adjustahle connection may consist of a right andv left hand threaded her 25, one end pass inn through the hottoni arm spaciiur lHQJll-- her and the other end. througha rotalahly mounted her 26 passing}; between the mas; members; Two euide blocks 2? are slid-- ahly .uiounted one in each of the channelshapcd arm members, and connecting said hloclrs together is the arch shaped liar es the centre of which is connected to one end of a chain 29 which passes over a pulley Ill) rotatahly secured to the spacer bar at the top of the arm and. thri'iu gh a hoisting hlock ell suspended from the cross uieniher of the mast. lhe block 31 sliowu oiling-raminatically is for illustrative purprwzes only and it will. be readily uuoerstood that any type of lioistinp; incchanh-un may he i; a ployed. Pivotally secured to the projection; 32 of the guide hlochs} a re the plates 3?; which support the frame 34; which carries the drill actucitingmechanism. 'lhis mechanism con-- sists mainly of a suitably {geared u'iotor 3th secured to the frame, a motor spindle 3th a coupli 3? connecting); the spini'll-e to a hot-- low me 38., which is suitably ed or con-- ueeted. to drive the shaft 39 and to allow some to slide back and forth i n the said sleeve. The sleeve is rotatably mounted on a hearing;- 40. which may be mounted. on the frame. Air cylinders 41 are positioned on either side of the bearing l0 and may he formed integral therewitlu as shown. The outer ends 412 of the piston rods working in said cylinders are attached to av crosshca d .13. wl'iicli holds the rotating shaft 39 a rainr-it thri'lst hearings istpositiinied on each side of the crosshcad. The thrust hearings are held against the crosshcad by means of the threaded collars l5 secured to the said shaft 39, so that any movement of the crosshead operated by the air pistons is transmitted to the shaft- 39, which is provided at its free end with a socket 46 to receive the rea-mer or drill 47. A handle 48 may be secured to the the back or motor end 49 of the frame.

The manner of mounting the device for operation is shown diagrammatically in Figure 4. The digester shell'50 is mounted preferably, but not necessarily, concentric with the footstep hearing. The mast is then placed in a substantially vertical position, as shown, and is rotatably anchored to the upper support. It will be readily seen that the arm may be set to any desired angle and in Figure 4" it is shown substantially parallel with the sloping side 51 of the shell 7 50. The drill actuating mechanism is raised or lowered within the arm and it will also be seen that theframe may be swung at any des'iredangle to the said arm; The mast being rotatablyv mounted, allows the drill to be rotated into any part in the circumference of the shell; The air cylinders form-a cushioned'v feeding mechanism for the drill or reamer. V

The device is very simple in operation and easily erected in position, and provides a highly eflicient device which can be quickly and easily. adju stedto drill and ream holes through the shell for vertical or circumferential joints in tubular structures.

Having thus described my invention. what I claim is 1. In a drilling machine, a mast comprising spaced vertical members, an arm pivotally mounted between said members, and a frame comprising spaced apart members pivotally and slidably attached between the spaced members forming the said arm.

2. In a drilling machine, a mast comprising spaced members, an arm tjfllllpllh'lllgl" spaced members pivotally mounted between the mast members, sliding members in said arm, a frame carrying the drill actuating mechanism pivotally suspended from the sliding members, and means for moving the sliding members in the arms.

3. In a drilling machine, a mast con'iprising spaced members, means for rotatably supporting the mast in a vertical position,

an arm comprising spaced members pivotally secured between the mast members, slide members mounted in the arm, a frame carrying the drill actuating mechanism, said frame being pivotally suspended between the slide members, and means for moving the slide members within the arm.

In witness whereof. I have hereunto set my hand.

HER-BERT w. McMlLLAN. 

